Hotels have a reasonable need to know that I am the person who paid for the service, so I can get what I paid for. The hotel also does not remember, a human glances at your ID to compare your name and that's that.

Google has no need to know who anyone is here. I want to provide an app, someone else wants to use my app, all entirely off Google's sacred platforms. We should be able to work together, but in comes a middleman who demands to see our IDs because he owns the platform and can just do that. That ID, of course, is digitally stored and will be retained indefinitely.

I, at least, also consider it unacceptable at hotels... But that battle already seems lost.

Please don't use one loss of privacy to justify more.

Something, something, slippery slope.